In the celebrated Menagerie at Knowsley fifty years ago this Antelope is stated by Gray to have bred but once at the time he was writing of it (1846). But shortly afterwards the herd of this animal in Lord Derby’s possession appears to have increased very rapidly. When the Menagerie was dispersed by auction after the Earl’s death in 1851 we find that four males and four females of this Antelope were entered in the sale-list, all described as having been bred at Knowsley. These passed into the possession of the late Viscount Hill, of Hawkstone, who at that epoch shared Lord Derby’s tastes in his love for keeping living animals. So far as we can tell from an inspection of the Zoological Society’s records, the first specimens of the Black-buck received by the Society were brought home by Col. Sykes (a well-known authority on Indian zoology) from Bombay in 1831. In the ‘Proceedings’ of the Society for 1836 Mr. E. T. Bennett, then Secretary of the Society, published some interesting remarks on this herd, especially referring to the vexed question of the use of the lachrymal sinus in Antelopes, which, from consideration of the relative development of it in the several specimens then in the Society’s Gardens, he showed was in all probability subservient to sexual purposes. As will be seen by reference to the nine published editions of the ‘Lists of Animals in the Society’s Collection,’ numerous specimens of the Black-buck have been acquired by the Society since that date, but, probably on account of the small free space assigned to them, little or no success has been met with in breeding this beautiful species in the Regent’s Park. On the other hand, at the Jardin d’Acclimatation at Paris and in other places under a climate more genial than our own, where large paddocks can be assigned to it, the Black-buck frequently reproduces in captivity and flourishes exceedingly. No figures of the Black-buck having been drawn under the late Sir Victor Brooke’s directions, our illustrations of this beautiful Antelope (Plate XLVII.) have been taken by Mr. Smit from two mounted specimens in the British Museum of Natural History, the male of which, from Gwalior, was presented by Mr. C. Maries, of the Gwalior Museum. [Illustration: Fig. 45. Horns of Black-buck, ♂. (In the Collection of Mr. A. O. Hume.)] [Illustration: Fig. 46. Abnormal horns of female Indian Antelope. (In the collection of Mr. A. O. Hume.)]